摘要
研究区域选在AERONET在中国地区代表性较强且观测时间序列较长的SACOL站点。运用该站点的Landsat5 TM影像数据,用6S模型、MODTRAN模型、ATCOR模型在没有参数的条件下分别对这一影像进行大气校正,再用影像实地测量的参数算出更接近真实地表反射率的的地表反射率对3种不同模型算出的地表反射率进行比较研究,结合NDVI值比较。结果显示FLAASH能更好地获得地表反射率,6S能使植被更突出,ATCOR处理速度快。在今后大气校正中可结合3种模型特点校正图像。
The study area is selected for the SACOL site with an important representation of AERONET in China and a longer observation time series. The Landsat5 TM image data of the site, the 6S model, MODTRAN model and ATCOR model are used for atmospheric correction of this image without measured data. The surface reflectance which is closer to the true is calculated with the parameters measured. Then the surface reflectance calculated by 3 different models is compared combined with NDVI value. The results show that FLAASH can get the surface reflectance better, 6S can make the vegetation more prominent, and ATCOR’s treatment is fast. In future atmospheric correction, the image can be corrected by combining the characteristics of 3 models.
作者
高书鹏
和萍
Shupeng Gao;Ping He(School of Tourism and Geography, Yunnan Normal University, Kunming Yunnan)
